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Finding the Fourth Proportional to 520,031.10, 780,046.65 and 431,384.70

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Solution

The fourth proportional to 520,031.10, 780,046.65 and 431,384.70 is: 647,077.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,031.10 : 780,046.65 = 431,384.70 : x
  2. Step 2: Convert to fraction form
    520,031.10/780,046.65 = 431,384.70/x
  3. Step 3: Cross multiply
    520,031.10x = 780,046.65 × 431,384.70
  4. Step 4: Simplify right side
    520,031.10x = 336,500,190,096.26
  5. Step 5: Solve for x
    x = 336,500,190,096.26/520,031.10
  6. Step 6: Final answer
    x = 647,077.05

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.